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전산화단층영상에서 절치관 및 순측 치조골 폭경에 관한 연구
노양균,장현선,김병옥,김진수 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.3
Purpose : To assess the width of the labial alveolar bone of the incisive canal and the width of the incisive canal on spiral computed tomographic images of the anterior portion of the maxilla. Materials and Methods : Study materials included 38 CT scans taken for preoperative planning of implant placement. Axial cross-sectioned image entirely showing the incisive canal was selected and scanned with 600 DPI resolution. The width of the labial alveolar bone of the incisive canal at an orifice to the oral cavity, middle portion, and an orifice to the nasal cavity and the diameter of the incisive canal at the middle portion were determined by two specialist using Digora for Windows 2.1. The statistical analyses were carried out using SPSS 12.0.1. Results : When the maxillary central incisors remained, the mean labial alveolar bone width were 6.81±1.41 mm, 6.46±1.33 mm, and 7.91±1.33 mm. When the maxillary central incisors were missed the mean width were 5.42±2.20 mm, 6.23±29 mm, and 7.89±2.13 mm. Conclusions : The labial alveolar bone width at middle portion and an orifice to the nasal cavity were of no statistical significant difference according to presence of the maxillary central incisors (P>0.05). The width between oral cavity and nasal cavity, middle portion and to nasal cavity revealed statistically significant difference (P<0.05).
Cartography 기법을 용한 CPM 네트워크 드로잉 시스템
노양균,오재광,박향재 계명대학교 산업기술연구소 1993 産業技術硏究所 論文報告集 Vol.16 No.1
Recently the scale of projects carried on for construction work and research job becomes larger, the importance of project management technique has been much more emphasized. For the efficient project management, CPM technique has been widely used as computers are being applied to various applications. In applying CPM technique, computerized network drawing is one of the most difficult problems, which requires both basic computer graphics knowledge and topological placing technology known as cartography. In this pater, a CPM network drawing system ha been developed using basic cartographic technology. The system provides various activity connection lines, reduces spatial collisions between activities, and also targets direct application to the actual project management system.